Well, sort of. The Alphard is closer to the size and weight as a T4 or T5, so it’s not fair to compare to a Golf or Passat. A T4 diesel gets around 35mpg in real life, and I hear a T5 averages around 40mpg, maybe slightly better on a long run.
My Yeti diesel doesn’t get close to 70mpg on a long run, ever. The brochure said it does, but I get at most 50 if I turn the air con off and have the wind behind me. I don’t even have a heavy foot.
The way to think about the hybrid in the Alphard is as a turbocharger with 4WD. Combined power puts it closer to the 3.5 than the 2.4 and fuel efficiency is better than both, certainly better than the 4WD model. Is it cost-efficient though? No.